X 2011 VPG MV-1 CNG

4.6 L, 8 cyl, Auto 4-spd, Natural Gas

EPA Fuel Economy

Combined: 13 MPG

City: 11 MPG

Highway: 16 MPG

X 2006 Audi A4

2.0 L, 4 cyl, Auto (variable gear ratios), Premium Gasoline

EPA Fuel Economy

Combined: 24 MPG

City: 21 MPG

Highway: 30 MPG